Figure 6  .

TGF-β2 mRNA levels in fetal, normal adult, and glaucomatous eyes, as determined by relative RT-PCR. Similar levels of TGF-β2 mRNA were observed in all samples tested (upper), when compared with β actin levels (lower). Lane 1, molecular weight marker (100 bp ladder, FMC Products); lane 2, cultured human brain astrocytes; lane 3, cultured type 1B astrocytes; lanes 4 and 5, fetal optic nerve heads, 19 and 20 weeks gestational age; lanes 6-8, normal adult optic nerve heads, donor ages 66, 88, and 94 years old; lanes 9-11, glaucomatous optic nerve heads, donor ages 53, 67, and 92 years old.